<template>
  <view>
    <!-- 搜索区域-->
    <my-search bgcolor="pink" radius="10" @click="gotoSearch"></my-search>

    <view class="scroll-view-container">
      <!-- 左侧的滑动区域 -->
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{ height: wh +'px'}">
        <block v-for="(item, i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',(i === active ? 'active':'')]" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>


      </scroll-view>
      <!-- 右侧的滑动区域 -->
      <scroll-view scroll-y="true" :style="{ height: wh +'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
          <!-- 二级分类标题 -->
          <view class="cate-lv2-title">/{{item2.cat_name}}/</view>

          <!-- 当前二级分类下动态渲染三级分类列表 -->
          <view class="cate-lv3-list">
            <!-- 三级分类item -->
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
              <!-- 三级分类图片 -->
              <image :src="item3.cat_icon"></image>
              <!--  <image :src="'https://www.loliapi.com/acg/'"></image> -->
              <!-- 三级分类标题 -->
              <text>{{item3.cat_name}}
              </text>

            </view>

          </view>
        </view>
      </scroll-view>


    </view>



  </view>
</template>

<script>
  import badgeMinx from '@/mixin/tabbar-badge.js'
  export default {
    mixins :[badgeMinx],
    data() {
      return {
        //当前设备可用的高度
        wh: 0,
        cateList: [],
        active: 0,
        //二级分类列表
        cateLevel2: [],
        //滚动条距离顶部距离
        scrollTop: 0

      };
    },
    async onLoad() {
      const sysInfo = await uni.getSystemInfoAsync()
      this.wh = sysInfo.windowHeight - 50 //屏幕可用高度，减去搜索框的高度
      this.getCateList()
    },
    methods: {
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get("/api/public/v1/categories")
        if (res.meta.status != 200) return uni.$showMsg()
        this.cateList = res.message

        //二级分类赋值
        this.cateLevel2 = res.message[0].children
        uni.$showMsg("数据请求成功！")

      },
      activeChanged(i) {
        this.active = i

        //重新为二级分类赋值
        this.cateLevel2 = this.cateList[i].children
        //重置滚动条距离顶部距离
        this.scrollTop === 0 ? 1 : 0
      },

      //点击跳转到商品列表页面
      gotoGoodsList(item3) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
        })
      },

      gotoSearch() {
        console.log("gogo")
        uni.navigateTo({
          url: "/subpkg/search/search"
        })
      }

    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;

      .left-scroll-view-item {
        background-color: #F7F7F7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;

        &.active {
          background-color: #FFFFFF;
          position: relative;

          &::before {
            content: '';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #C00000;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
          }
        }
      }
    }

    .cate-lv2-title {
      font-size: 12px;
      font-weight: bold;
      text-align: center;
      padding: 15px 0;
    }

    .cate-lv3-list {
      display: flex;
      flex-wrap: wrap;

      .cate-lv3-item {
        width: 33.33%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        margin-bottom: 10px;

        image {
          width: 60px;
          height: 60px;
        }

        text {
          font-size: 12px;
        }
      }

    }
  }
</style>